In May, Federal Way typically sees daytime highs of 18.4°C and overnight lows around 7.7°C. Compared to the annual average high of 15.5°C, May runs +2.9°C.
May in Federal Way averages a daytime high of 18.4°C and an overnight low of 7.7°C.
May runs +2.9°C compared to Federal Way's annual average high of 15.5°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 18.4°C and cooler evenings around 7.7°C.